ide: add ide_tf_load() helper
Based on the earlier work by Tejun Heo.
* Add 'tf_flags' field (for taskfile flags) to ide_task_t.
* Add IDE_TFLAG_LBA48 taskfile flag for LBA48 taskfiles.
* Add IDE_TFLAG_NO_SELECT_MASK taskfile flag for __ide_do_rw_disk()
which doesn't use SELECT_MASK() (looks like a bug but it requires
some more investigation).
* Split off ide_tf_load() helper from do_rw_taskfile().
* Convert __ide_do_rw_disk() to use ide_tf_load().
There should be no functionality changes caused by this patch.
Cc: Tejun Heo <htejun@gmail.com>
Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
diff --git a/drivers/ide/ide-disk.c b/drivers/ide/ide-disk.c
index 20d357e..6387222 100644
--- a/drivers/ide/ide-disk.c
+++ b/drivers/ide/ide-disk.c
@@ -140,7 +140,8 @@
u8 lba48 = (drive->addressing == 1) ? 1 : 0;
u8 command = WIN_NOP;
ata_nsector_t nsectors;
- struct ide_taskfile ltf, *tf = <f;
+ ide_task_t task;
+ struct ide_taskfile *tf = &task.tf;
nsectors.all = (u16) rq->nr_sectors;
@@ -156,12 +157,8 @@
ide_map_sg(drive, rq);
}
- if (IDE_CONTROL_REG)
- hwif->OUTB(drive->ctl, IDE_CONTROL_REG);
-
- /* FIXME: SELECT_MASK(drive, 0) ? */
-
- memset(tf, 0, sizeof(*tf));
+ memset(&task, 0, sizeof(task));
+ task.tf_flags = IDE_TFLAG_NO_SELECT_MASK; /* FIXME? */
if (drive->select.b.lba) {
if (lba48) {
@@ -185,6 +182,7 @@
tf->hob_lbah, tf->hob_lbam, tf->hob_lbal,
tf->lbah, tf->lbam, tf->lbal);
#endif
+ task.tf_flags |= IDE_TFLAG_LBA48;
} else {
tf->nsect = nsectors.b.low;
tf->lbal = block;
@@ -208,21 +206,7 @@
tf->device = head;
}
- if (drive->select.b.lba && lba48) {
- hwif->OUTB(tf->hob_feature, IDE_FEATURE_REG);
- hwif->OUTB(tf->hob_nsect, IDE_NSECTOR_REG);
- hwif->OUTB(tf->hob_lbal, IDE_SECTOR_REG);
- hwif->OUTB(tf->hob_lbam, IDE_LCYL_REG);
- hwif->OUTB(tf->hob_lbah, IDE_HCYL_REG);
- }
-
- hwif->OUTB(tf->feature, IDE_FEATURE_REG);
- hwif->OUTB(tf->nsect, IDE_NSECTOR_REG);
- hwif->OUTB(tf->lbal, IDE_SECTOR_REG);
- hwif->OUTB(tf->lbam, IDE_LCYL_REG);
- hwif->OUTB(tf->lbah, IDE_HCYL_REG);
-
- hwif->OUTB(tf->device | drive->select.all, IDE_SELECT_REG);
+ ide_tf_load(drive, &task);
if (dma) {
if (!hwif->dma_setup(drive)) {
diff --git a/drivers/ide/ide-taskfile.c b/drivers/ide/ide-taskfile.c
index 5a1a9f7..a79150e 100644
--- a/drivers/ide/ide-taskfile.c
+++ b/drivers/ide/ide-taskfile.c
@@ -63,6 +63,37 @@
}
}
+void ide_tf_load(ide_drive_t *drive, ide_task_t *task)
+{
+ ide_hwif_t *hwif = drive->hwif;
+ struct ide_taskfile *tf = &task->tf;
+ u8 HIHI = (task->tf_flags & IDE_TFLAG_LBA48) ? 0xE0 : 0xEF;
+
+ if (IDE_CONTROL_REG)
+ hwif->OUTB(drive->ctl, IDE_CONTROL_REG); /* clear nIEN */
+
+ if ((task->tf_flags & IDE_TFLAG_NO_SELECT_MASK) == 0)
+ SELECT_MASK(drive, 0);
+
+ if (task->tf_flags & IDE_TFLAG_LBA48) {
+ hwif->OUTB(tf->hob_feature, IDE_FEATURE_REG);
+ hwif->OUTB(tf->hob_nsect, IDE_NSECTOR_REG);
+ hwif->OUTB(tf->hob_lbal, IDE_SECTOR_REG);
+ hwif->OUTB(tf->hob_lbam, IDE_LCYL_REG);
+ hwif->OUTB(tf->hob_lbah, IDE_HCYL_REG);
+ }
+
+ hwif->OUTB(tf->feature, IDE_FEATURE_REG);
+ hwif->OUTB(tf->nsect, IDE_NSECTOR_REG);
+ hwif->OUTB(tf->lbal, IDE_SECTOR_REG);
+ hwif->OUTB(tf->lbam, IDE_LCYL_REG);
+ hwif->OUTB(tf->lbah, IDE_HCYL_REG);
+
+ hwif->OUTB((tf->device & HIHI) | drive->select.all, IDE_SELECT_REG);
+}
+
+EXPORT_SYMBOL_GPL(ide_tf_load);
+
int taskfile_lib_get_identify (ide_drive_t *drive, u8 *buf)
{
ide_task_t args;
@@ -83,30 +114,11 @@
{
ide_hwif_t *hwif = HWIF(drive);
struct ide_taskfile *tf = &task->tf;
- u8 HIHI = (drive->addressing == 1) ? 0xE0 : 0xEF;
- /* ALL Command Block Executions SHALL clear nIEN, unless otherwise */
- if (IDE_CONTROL_REG) {
- /* clear nIEN */
- hwif->OUTB(drive->ctl, IDE_CONTROL_REG);
- }
- SELECT_MASK(drive, 0);
+ if (drive->addressing == 1)
+ task->tf_flags |= IDE_TFLAG_LBA48;
- if (drive->addressing == 1) {
- hwif->OUTB(tf->hob_feature, IDE_FEATURE_REG);
- hwif->OUTB(tf->hob_nsect, IDE_NSECTOR_REG);
- hwif->OUTB(tf->hob_lbal, IDE_SECTOR_REG);
- hwif->OUTB(tf->hob_lbam, IDE_LCYL_REG);
- hwif->OUTB(tf->hob_lbah, IDE_HCYL_REG);
- }
-
- hwif->OUTB(tf->feature, IDE_FEATURE_REG);
- hwif->OUTB(tf->nsect, IDE_NSECTOR_REG);
- hwif->OUTB(tf->lbal, IDE_SECTOR_REG);
- hwif->OUTB(tf->lbam, IDE_LCYL_REG);
- hwif->OUTB(tf->lbah, IDE_HCYL_REG);
-
- hwif->OUTB((tf->device & HIHI) | drive->select.all, IDE_SELECT_REG);
+ ide_tf_load(drive, task);
if (task->handler != NULL) {
if (task->prehandler != NULL) {
diff --git a/include/linux/ide.h b/include/linux/ide.h
index 69b78bb..e25fd0b 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -1060,6 +1060,11 @@
*/
extern int ide_wait_cmd(ide_drive_t *, u8, u8, u8, u8, u8 *);
+enum {
+ IDE_TFLAG_LBA48 = (1 << 0),
+ IDE_TFLAG_NO_SELECT_MASK = (1 << 1),
+};
+
struct ide_taskfile {
u8 hob_data; /* 0: high data byte (for TASKFILE IOCTL) */
@@ -1094,6 +1099,7 @@
struct ide_taskfile tf;
u8 tf_array[14];
};
+ u8 tf_flags;
ide_reg_valid_t tf_out_flags;
ide_reg_valid_t tf_in_flags;
int data_phase;
@@ -1104,6 +1110,8 @@
void *special; /* valid_t generally */
} ide_task_t;
+void ide_tf_load(ide_drive_t *, ide_task_t *);
+
extern u32 ide_read_24(ide_drive_t *);
extern void SELECT_DRIVE(ide_drive_t *);